What best describes the states of nonmetals when they are at room temperature? a. most nonmetals are gaseous, but some are liquid or solid. b. all nonmetals are gaseous unless they bond with a metal. c. most nonmetals are solids, but some are gaseous or liquid. d. all nonmetals are solid unless they bond with a metal.

Option (A) is the correct answer.

Explanation:

Non-metals are the substances that contain less number of electrons as compared to metals.

Most of the non-metals exist in gaseous state at room temperature. For example, oxygen, fluorine, chlorine, nitrogen etc are all gases at room temperature.

Whereas bromine exist as a liquid ate room temperature and some non-metals like carbon, iodine, arsenic etc exist as solid at room temperature.

Thus, we can conclude that the statement, most nonmetals are gaseous, but some are liquid or solid, best describes the states of nonmetals when they are at room temperature.